Shuttle-motion.



A. IVI. SUTHER.

SHUTTLE MOTION.

APPLlcAloN FILED JULY l. |916.

In l 5 woe/MCO@ M .ALFRED 1.1. SUTEEB, F ALZEIQ'TSJ PENNSYLVANIA.

ASSGNOB; T0 SCHAUM &

UI-LING-ER INCOREGBTEJ, PELLADELPBI., BENNSY VANLCL, A COBFRA- TION 0F PEN NSYLVN 1A.

Speccation of Letters Patent.

Patented Feb. 19, 1918.

Application ieii Jury 1, 1916. Serial No. 107,016.

To all whom t may concern:

Be it known that l, antenne lil. Su'rnnn, a citizen of the United States, and a resident of Allentown, county of Lehvgh, and State of Pennsylvania, have invented new and useful Improvements in Shuttle-Motions, of which the following is a specification.

The invention relates to looms and particularly to the shuttle driving motion for narrow fabric looms, such as tape and ribbon looms.

One object of the invention is to provide a construction in which positive motion will be imparted to the shuttles of a single or double deck batten or lay.

As illustrating a speciiic embodiment of the inventlon reference is made to the drawing forming a part of this specification and in which drawing,

Figure 1 is an elevation of an end or front portion of a loom.

Fig. 2 is an elevation of a side portion of a loom.

Figs. 3 and 4 are, respectively, vertical and plan views partially broken away showing details of the bevel-gear constructions and the movable bearing member or casting which maintains them in operative position relative to each other.

The frame or housing is designated by 1 and upon this there is mounted a main shaft 2 which is preferably the driving shaft of the machne. There are also indicated two series of shuttles 3. Tt will be noted that a loom might embody only a single shuttle, or a series of shuttles, or a plurality of series of shuttles and still come within the spirit and scope of the invention, as will hereinafter appear. These shuttles constitute a part of the lay or hatten e.

This lay or batteri has the usual battenbeam 5 and the shuttles are arranged above this hatten-beam. The lay also comprises a number of castings Il. Each of the castings 4, is carried by and connected to the upper free ends of a pair of parallel motion links 6, or lay-arms as they may be called. These links are pivotally mounted at 7 upon the main frame or housing 1. To each of these castings t there is also secured one end of a connecting link h' the other end of wh`ch link is secured to the pin 9 of a main crank 9 that is carried on the main shaft 2. The connecting link 8 is adjustable in length and the pin is adjustable along the slotted portion 9 of the main crank 9 so that the forward and backward movement or sweep which .s imparted to the lay from said main crank can be regulated. This movement is indicated at 10. Upon the main shaft 2 there is also carried an eccentric gear 11 which is secured to said shaft so as to rotate therewith. An elliptical gear 12 having twice the number of teeth of the eccentric gear 11 meshes with the latter and is carried on a shaft 13 that is in a bearing 1e on the main frame of the machine. The elliptical gear 12, through the medium of the shaft 13, drives a bevel-gear 15 that in turn meshes with and drives a second bevelgear 16. These bevel-gears are held in operative engagement relative to each other by a movable bearing member or casting 17 which is clearly illustrated in Figs. 3 and e. This member 17 is constructed so that it can have a slight angular movement about the shaft 13 or rather about the bearing 111 in which the shaft 13 is carried. The purpose of this slight movement will subsequently be referred to. A splined shaft 1S passes through, is driven by and can slide relative to the bevel-gear 16. This shaft is connected through the medium of a universal joint 19 to a shaft 2O that carries a crank 21 which is frequently hereina ter referred to as a rack operating crank. This crank,through suitable mechanism, reciprocates a rack that moves the shuttle or shuttles 3 above referred to across and back. A rack for accomplishing this purpose is referred to in United States Patent No. 160,662 dated October 6, 1891, granted to Otto W. Schaum for improvements in narrow ware looms, and is well known in the art. Tn the patent just referred to a mechanism comprising an eccentric gear and elliptical gear for actuating a shuttle rack is clearly shown and described and the present invention may in many respects be considered to be an improvement upon the invention shown, described and claimed in said patent, although it will be manifest from some of the accompanying claims that the invention herein sought to be protected is not necessarily limited to a loom construction in which said eccentric gear and elliptical gear are employed as a part of the mechnism for actuating the shuttle rack. The rack operating crank 21 has at the free end thereof a crank pin 22-comprising a block 23-that has a sliding engagement with the slotted portion 24 of a cross-head 25. This cross-head 25V is carried at the free ends, 26 and 27, of parallel motion links 28 and 29that are respectively mounted at 30 and 31 on a casting 4 which is secured by lag bolts b to the hatten-beam of the lay-head. This casting 4 has a bearing 20 which .supports or carries the shaft 20 previously referred to. An arm 32 is connected through the medium of a shaft 30 to the link 28 of the parallel motion mechanism which supports the crosshead. The upper free end of this arm 32 is connected vthrough the medium of a pin 33, link 34 and pin 35 to a casting which is secured to the rack members 37 so -as to actuate the latter, which rack members are constructed so as to move the shuttles across and back as the rack members are reciprocated, as heretofore indicated.

l llhile the casting 4 has been shown as one altogether independent of the casting 4 the casting that is secured to the upper end of the parallel motion links or lay-arms 6 -still it will be manifest that these two castings could be embodied in one, if desired.

From what has preceded and from an inspection of the drawing it will be manifest that the main shaft 2 canA reciprocate the lay forward and back through the medium of the connecting link 8 and the main crank 9. This mechanism may therefore be referred to as the operating means for recipro` eating the lay. Due to the fact that the crank is arranged whereby the link will be passing dead center7 when the lay is near the extremities of the travel there will bean appreciable dwell of the lay at the extremities of its travel. The eccentric gear and the elliptical gear are arranged so that when the lay is at the eXtreme back position of its travel the elliptical gear will be rotating at its greatest angular velocity. As the elliptical gear has twice the number of teeth of the eccentric gear the elliptical gear will be moving at its |slowest angular velocity when the lay is in what may be referred to as its extreme forward position. The bevelgears 15 and 16 have a ratio of 1 to 1 and consequently the rack operating crank and the elliptical gear will rotate in unison with each other and the crank may be considered to be driven from the elliptical gear even though there Vare between the two the bevelgears 15 and 16, the splined shaft 18, the universal joint 19 and the shaft 20 which carries the crank 21.

The eccentric gear moves at a constant angular velocity and hence the elliptical gear which is driven by the eccentric gear moves at varying angular velocities. The crank 21 which moves in unison with the elliptical gear also moves at varying angn lar velocities. It will here be noted that the elliptical gear and the crank arm are both members which continuously rotate when the loom is in operation. The hatten or lay is .shown at the extreme back position of its travel in F ig. 2 and with the lay in this position the pin 22 on the rack operating crank 21 is at or near either the top or bottom of the slot 24 of the cross-head which said pin 22 actuates. Fromk this figure it will be observed when the parts occupy the position shown, that is with the. lay at the extreme back position of its travel, the eccentric gear 11 and the elliptical gear 12 are arranged so that the elliptical gear is moving at its greatest angular velocity and so that the pin 22-which is driven by the elliptical gear 12 through the medium of the bevel-gears 15 and lf3-is also moving at its greatest angular velocity. This greatest velocity of the pin 22 is when the pin is near either the top or bottom ofthe slot 24 whereby the pins effective movement on the memyber actuated by it will be a maximum.

There is a multiplying of the velocity due to the elliptical gear construction and again due to the particular arrangement of the crank and cross-head relative to each other when the lay is at or near the extreme back of its travel. lNhen, however, the ylay reaches its eXtreme forward position the elliptical gear has its slowest movement and at this time the pin 22 of the crank 21 occupies what maj.7 be considered as the end positions of its travel because there is a sub-V stantial dwell at this time of the movement of the cross-head and the shuttles actuated thereby. This dwell occurs between the re versal of the movements of the cross-head and at this time the pin is located half way between the top and Vthe bottom of the slotted portion. Tt will therefore be seen that when the lay is in extreme forward position of stroke the shuttles are practically at rest or dwell and that when the lay is in extreme back position and practically at rest the shuttles are moving at their greatest rate of speed. As the crank 21 actuates the shuttle racks through the medium of the mechanism previously mentioned it has been referred to in this application as the rack operating crank. The motion which the rotation of the crank imparts to the cross-head that is slidably engaged thereby may be re-` ferred to as a harmonic motion, and it is this motion which is imparted to the shut tles. The mechanism which comprises the eccentric gear con.struction,the bevel-gears, the splined shaft, the universal joint, the

crank, cross-head and other elements which erating the lay to move the latter forward and back.

The improvements herein set forth are not limited to the precise construction and arrangement shown and described for they may be embodied in various forms and modiications without departing from the spirit and scope of the invention.

What l claim is:

1. In combination in a loom a batten or lay having a shuttle and a reciprocating rack for moving the shuttle across and back, a main shaft, means between the main shaft for reciprocating the hatten or lay forward and back, which means is constructed so that there is a dwell of the batten or lay at each extremity of its forward and rearward movement, an eccentric gear secured to the main shaft, an auxiliary elliptical gear having twice the number of teeth as the eccentric gear and in mesh therewith, which eccentric gear and elliptical gear are arranged in respect to the hatten or lay so that when the latter is at the extreme of its rearward movement of travel the elliptical gear will be moving at its fastest angularv velocity and so that when the hatten or lay is at the extremity of its forward movement of travel the elliptical gear will be moving at its slowest angular velocity, a rack operating crank operated by and in unison with the ellipticaly gear, a slotted cross-head in the slotted portion of which said crank travels so as to reciprocate the cross-head, and means between the cross-head and the reciprocating rack whereby as the cross-head is reciprocated the racks will move the shuttles across and back, the rack operating crank being arranged so that when the elliptical gear is being moved at its fastest angular velocity the rack crank will be in a position to impart the greatest speed of movement to the slotted cross-head when the latter is at the extremity of forward movement and so that when the elliptical gear is being moved at its slowest angular velocity the rack operating crank will be in a position where there will be a dwell or only a slight movement imparted to the slotted cross-head by said rack operating crank.

2. A loom having in combination a hatten or lay that is provided with a shuttle, a main shaft, means between said main shaft and said batten or lay whereby the batten or lay will be reciprocated forward and back but so as to permit dwell at each extremity ofthe forward and backward movement of the hatten or lay, an eccentric gear driven by said main shaft, an auxiliary elliptical gear having twice the number of teeth of the eccentric gear and in mesh therewith, which elliptical gear is arranged so that it will have its fastest angular velocity when the batten or lay is in one of the dwells and so that said elliptical gear will have its slowest angular velocity when the hatten or lay is in the other of the dwells, a crank actuated by and in unison with said elliptical gear, a cross-head having a slotted portion with which the crank pin of the crank has sliding engagement whereby as the crank rotates the crossbead will have a harmonic reciprocatory motion imparted thereto, and means between said cross-head and said shuttle whereby said motion will be imparted to said shuttle from said cross-head, the arrangement being such that the crank pin is at or near an extremity of the slot in the cross-head when the batten or lay is at one extremity of its travel.

3. In combination in a loom, a hatten or lay having a shuttle thereupon, means for reciprocating the batten or lay forward and back, a cross-head, a continuously rotating l crank having a pin which has a sliding engagement with said cross-head, and means between the cross-head and the shuttle whereby the shuttle will be reciprocated across and back as the cross-head is reciprocated by the crank, the crank being positioned so that when the batten or lay is at its rearmost posit-ion the crank pin will be moving the crosshead at its fastest velocity.

i. In combination in a loom, a batten or lay having shuttle, a main shaft, means between the main shaft and the batten or lay for reciprocating the latter, a second shaft carried by the frame of the loom, an eccentric gear carried by the main shaft, an auxiliary elliptical gear carried by the second shaft, a bevel-gear driven by said elliptical gear, a second bevel-gear in mesh with and driven by said first mentioned bevel-gear, a movable bearing member for maintaining said bevel-gears inoperative relation in respect to each other, a splined shaft passing through, driven by, and slidable relatively to said second mentioned bevel-gear, a crank on a shaft which is carried by and movable with said batten or lay, a universal coupling between the splined shaft and the shaft carrying said crank, a cross-head with which the crank pin of said crank has a sliding engagement, which cross-head is carried by and movable relatively to said batten or lay, and means whereby motion can be imparted from said cross-head to said shuttle.

5. A loom comprising in combination with the batteri or lay having a shuttle thereupon and means for reciprocating the batten or lay, of a crank carried on the batten or lay, means whereby said crank is continuously rotating from said hatten or lay reciprocating means, links pivotally mounted on the batten or lay, a cross-head carried at the free ends of the links, which cross-head is reciprocated by said continuously rotated crank, and means between said cross-head and said shuttle whereby movement from said crosshead is imparted to said shuttle.

6. A loom having in combination with the batten or lay and shuttle mechanism carried.

thereon of a cross-head carried at the free ends of parallel motion links that are pivot-V ally movably mounted on the hatten or lay, a crank having a 'slidingl engagement With said cross-head for reciprocating the latter and an arm connected to said parallel m0- tion links for actuating the shuttle mechanism.

7. A loom having in combination a batten or lay, a cross-head carried at the free ends of parallel motion links that are pivotally mounted on the hatten or 1ay,a crank having a sliding engagement With said cross-head for reciprocating the latter, and means Jfor actuating a shuttle mechanism yfrom said l5 cross-head. y

This specification signed and witnessed this 28th day of June A. D., 19,16.

y ALFRED M, SUTHER. Signed in the presence of- NORMAN L. C. TROXELL, AGNES L SOUDER.

copies of this patent may be obtained for ve cents each, by addressing thecommissioner of Patents,

' Washington, D. C. 

